Discharge lamp ballast apparatus comprising DC/DC converters...

Details Discharge lamp ballast apparatus comprising DC/DC converters... Discharge lamp ballast apparatus comprising DC/DC converters...

2005-10-25

2009-11-03

Vo, Tuyet (Department: 2821)

Electric power conversion systems

Current conversion

Having plural converters for single conversion

C363S068000, C363S071000, C363S061000, C363S021140, C315S20000A, C315S207000, C315S247000, C315S291000

Reexamination Certificate

active

07613020

ABSTRACT:
A discharge lamp ballast apparatus includes a DC/DC converter having a transformer T1and a DC/DC converter having a transformer T2, which are connected in parallel; a control section4for controlling the output voltages of the DC/DC converters by varying their duties with shifting the operation phases of the transformers T1and T2of the DC/DC converters; and a voltage-multiplier rectifier circuit having diodes7-9and capacitors10-12for generating a high voltage used for starting a discharge lamp22by utilizing the potential difference between the output voltages of the transformers T1and T2.

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